SPECIAL PURPOSE COMPUTER

TM 9-6920-737-10

SPECIAL PURPOSE COMPUTER - UNIT 10

The SPC is located in the Computer Shelter facing the center of the complex. The SPC consists of a two-bay

cabinet assembly with two access doors on the front and two on the rear of the assembly. Each bay of the SPC

contains a logic card file assembly mounted on a swingframe and accessed when the doors are opened. The

lower, front portion of the SPC contains a Power Management Assembly (1) with front panel controls and

indicators. Duplex utility power receptacles and communication jacks (2) are mounted on the center supports

of the cabinet, both front and rear.

Card file assemblies Al (3) and A2 (4) are accessed from the front of the cabinet and A22 (5) and A21 (6) from

the rear of the cabinet. Each card file assembly contains 5 rows of plug-in circuit card assemblies (7) which

provide the electronics for development of sight scene visual displays and simulated sounds. Identification and

replacement procedures for the circuit card assemblies are described in Chapter 3, Section III. Each card file

assembly also contains eight cooling fans, four at the top and four at the bottom of the assembly.

Power Management Assembly A4 (I) is mounted in the front, lower right-hand side of the cabinet and contains a

front panel circuit breaker, elapsed time indicator, power supply "ON" indicators, and over-temperature

indicators. Six blowers (8) in the assembly provide additional cooling air for SPC. Plates (9) at the lower rear

of each cabinet cover the access to air filters (10).

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